PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-13:57:40
G08     296.8          21.7                5.3 +/-    1.67      11.1 +/-    1.67  0.070 / 0.070
G10     3.9            63.0                4.1 +/-    1.25       4.5 +/-    1.25  0.080 / 0.100
G14     229.0          43.9                6.9 +/-    2.33       9.5 +/-    2.33  0.080 / 0.110
G21     145.4          39.1                6.8 +/-    1.06      10.0 +/-    1.06  0.100 / 0.120
G24     57.7           26.6                3.0 +/-    1.58       5.7 +/-    1.58  0.040 / 0.080
G27     254.4          32.0                4.0 +/-    1.78       6.7 +/-    1.78  0.040 / 0.080
G32     244.7          67.5                4.4 +/-    0.67       4.7 +/-    0.67  0.100 / 0.160